Induced Gamma-Band Activity and Human Brain Function

@article{Kaiser2003InducedGA,
  title={Induced Gamma-Band Activity and Human Brain Function},
  author={Jochen Kaiser and Werner Lutzenberger},
  journal={The Neuroscientist},
  year={2003},
  volume={9},
  pages={475 - 484}
}
Oscillatory activity in the gamma-band range has been related both to gestalt perception and to cognitive functions such as attention, learning, and memory. After giving a brief account of recent findings from electroencephalography and intracortical recordings, the present review will focus on spectral activity in the magnetoencephalogram. Here, gamma-band effects are topographically more local and involve higher frequencies than in the electroencephalogram. Bottom-up-driven auditory spatial… Expand
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References

SHOWING 1-10 OF 79 REFERENCES
Dynamics of gamma-band activity in human magnetoencephalogram during auditory pattern working memory
TLDR
The memorization of syllables was associated with synchronously oscillating networks both in frontotemporal cortex, supporting a role of these areas as parts of the putative auditory ventral stream, and in prefrontal, possible executive regions. Expand
Dynamics of Gamma-Band Activity during an Audiospatial Working Memory Task in Humans
TLDR
Gamma-band activity during the volume task may reflect auditory pattern encoding in auditory ventral stream areas and increased coupling between networks serving representation of audiospatial information and frontal executive systems seems to activate frontal and parietal neuronal ensembles. Expand
Modulation of induced gamma band activity in the human EEG by attention and visual information processing.
  • M. Müller, T. Gruber, A. Keil
  • Psychology, Medicine
  • International journal of psychophysiology : official journal of the International Organization of Psychophysiology
  • 2000
TLDR
Results of the present experiments in combination with other studies presented in this volume are supportive for the notion that induced gamma band activity in the human EEG is closely related to visual information processing and attentional perceptual mechanisms. Expand
Functional mapping of human sensorimotor cortex with electrocorticographic spectral analysis. II. Event-related synchronization in the gamma band.
TLDR
Gamma ERS may provide complementary information about cortical neurophysiology that is useful for mapping brain function in humans, and maps of sensorimotor function inferred from gamma ERS were consistent with maps generated by cortical electrical stimulation for clinical purposes. Expand
Dynamics of gamma-band activity induced by auditory pattern changes in humans.
TLDR
The results support the hypothesized role of anterior temporal/ventral prefrontal regions in the processing of auditory pattern change and extend earlier findings of gamma-band activity over posterior parieto-temporal cortex during auditory spatial processing that supported the putative auditory dorsal stream. Expand
Selective visual-spatial attention alters induced gamma band responses in the human EEG
TLDR
The rotating stimulus elicited higher gamma band power as compared to the standing stimulus at electrode locations, which may be related to the activity of underlying cortical structures specialized for motion processing. Expand
Human Gamma Band Activity and Perception of a Gestalt
TLDR
The topography of gamma band spectral power and event-related potentials in human EEG associated with perceptual switching effected by rotating ambiguous (bistable) figures support the notion that formation of a visual percept may involve oscillations in a distributed neuronal assembly. Expand
Induced electrocorticographic gamma activity during auditory perception
Abstract Objective : To define the spatial, temporal, and functional characteristics of induced gamma (>30 Hz) activity during functional activation of the left superior temporal gyrus. Methods :Expand
Induced gamma-band activity during the delay of a visual short-term memory task in humans.
It has been hypothesized that visual objects could be represented in the brain by a distributed cell assembly synchronized on an oscillatory mode in the gamma-band (20-80 Hz). If this hypothesis isExpand
Visually induced gamma‐band responses to coherent and incoherent motion: a replication study
TLDR
The present results suggest that oscillations in the gamma- and the alpha-bands are two different brain activities, with different functional implications. Expand
...
1
2
3
4
5
...